• [1]

    A. Einstein., reprinted in: Principle of Relativity., ed. A. Sommerfield (Dover. London, 1923), 191.[2] A. Salam., in: Five Deades of Weak Interactions., ed. N. P. Chang, Ann. N. Y. Acad. Sci., 294(1977), 12.[3] C. Sivaram and K. P. Sinha., Phys Rep, 51, N.3, (,1979), 111-187.[4] H. A. Buchdahl., J. Phys. A: Mash. Cers., N.8(1979), 1234.[5] 李元杰,高能物理与核物理,11(1989),990.[6] C. Sivaram and K. P. Sinha, Progr, Theor. Phys. (Kyoto) 55, (1976) 1288.[7] Luis Farina-Busto., Phys. Rev., N.6(1988), 1741.